A fellow Reonaut asked if I could make a brass button cover. Well since since the button & button cover are delrin, I thought metal on delrin might be trickier for a friction fit. Could have took an easier route but I was up for the challenge. I sure won't be making these often, had to hold a tolerance of 2 tenth of a thousandths.
Here's what I came up with to match the grooves on the RM2.
While I was at it, made another style.